Bijender K.

I build and repair production .NET and React systems: ASP.NET Core APIs, SQL Server performance, and AWS or Azure deployments. Clients hire me when an API is failing, a database is slow, or a React front end needs a stable backend. I have 10+ years in full-stack .NET, a 100% Upwork Job Success Score, and a 5.0 rating. What I deliver: - ASP.NET Core and Web API design, bug fixes, and third-party integrations - SQL Server query and schema tuning - React and Angular front ends wired to those APIs - AWS and Azure setup, including Lambda - RAG and AI features added to existing business apps Recent work includes a cloud ERP, an AI document-intelligence platform, and engineering-consultancy software. I am available 30+ hours a week and start with a short scope call, then small reviewable milestones.